4757 Hogwarts Castle is a Harry Potter set released in 2004. It comes with Hogwarts Castle, and several minifigures. Gryffindor Tower can be entered by turning the painting. The wind up gears turn the clock dial and swing the pendulum. There are also two sets of gates. If the spider near some stairs is pulled, the trap door will open. It is based off of its appearance in Harry Potter and the Prisoner of Azkaban.